SIEMENS
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Siemens IK PI · 2015
Industrial Wireless Communication
IWLAN – Accessories
IWLAN antennas
6
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Function
Separate antennas are used to optimize the radio field for the
application. In industrial applications, this permits a reliable
radio link.
Antennas with multiple connections
(dual or MIMO antennas)
Antennas with two connections combine two individual
antennas, at 90° to each other, in a single antenna enclosure.
With these antennas, two data streams can be transferred
simultaneously thanks to the two different polarization levels.
Depending on the alignment of the polarization levels, these
antennas are referred to as dual-slant (rotated through +/-45°)
or vertical-horizontal.
Antennas with three connections contain three individual emit-
ters that can be combined in a single enclosure, either on differ-
ent polarization levels (0°, +/-45°) or at a suitable distance from
each other. The MIMO antennas can transmit or receive three
data streams simultaneously using multiple path propagation.
Transmission of several data streams results in increased data
throughput and simultaneously a more reliable data transfer.
Directional effect
The suitable antenna is selected first by means of the wireless
field characteristic. A distinction is made between omnidirec-
tional antennas and directional antennas.
Omnidirectional antennas
Omnidirectional antenna
With omnidirectional antennas, the radio field is emitted in every
direction surrounding the antenna (horizontal opening angle:
360°), but it weakens as the distance increases. There is a
concentration in the vertical direction which creates passive
amplification of the radio field. Many omnidirectional antennas
have extremely weak radiation directly below the antenna due to
their type of construction. This property can be seen in the
associated antenna diagram.
ANT795-4Mx
With these omnidirectional antennas, the radio field is concen-
trated at 2.4 GHz and 5 GHz in the vertical plane of the antenna.
All antennas of this type have an opening angle of 30° in the
vertical direction and an antenna gain of 3/5 dBi. They are
directly mounted on the R-SMA or N connector of the
SCALANCE W enclosure.
ANT795-4MA, ANT795-4MC and ANT795-4MD
The ANT795-4MC and ANT 795-4MD antennas can be rotated
around only one axis, they have N-Connect connectors and
degree of protection IP65 and are used with the SCALANCE
W788 M12 Access Points and the SCALANCE W748 M12 Client
Modules.
The ANT795-4MA antenna features an additional joint, an
R-SMA connector, and degree of protection IP30. It is therefore
optimally suitable for the SCALANCE W788 RJ45, W770 and
W760 Access Points and the SCALANCE W748 RJ45, W730 and
W720 Client Modules.
ANT792-6MN, ANT793-6MN
With these omnidirectional antennas, the radio field is concen-
trated at 2.4 GHz (ANT792-6MN) and 5 GHz (ANT793-6MN) in
the vertical plane of the antenna. The antennas have a gain of
6 dBi and 5 dBi respectively.
N-Connect is used as the connection plug and can be con-
nected to SCALANCE W over an antenna connection cable from
the range of IWLAN cabling. Both antennas are supplied with a
mounting aid (metal bracket) that supports wall or mast mount-
ing. The antennas are therefore ideally suited, for example, to
providing radio coverage for a place that has a mast at its center
on which they can be mounted.
ANT795-6MN, antenna mounting tool for ANT795-6MN
With this omnidirectional antenna, the radio field is concentrated
at 2.4 GHz and 5 GHz in the vertical plane of the antenna. The
antenna has a gain of 6 dBi and 8 dBi respectively.
N-Connect is used as connection plug. The antenna can be
connected to SCALANCE W over an antenna connection cable
from the IWLAN cabling systems range. The antenna character-
istic is such that good transmission properties also exist directly
above and below the antenna. It is designed for mounting on a
control cabinet or roof, but it can also be mounted under a roof,
so it is suitable, for example, for the mobile units of an automated
guided vehicle system. If it needs to be installed on a ceiling
under a roof, the optional antenna mounting tool for
ANT795-6MN is used.
ANT795-6MT
This antenna is an omnidirectional MIMO antenna with three
QMA connections. The wireless field is concentrated at 2.4 GHz
and 5 GHz in the vertical plane of the antenna. The antenna has
a gain of 6 dBi.
The antenna characteristic is such that good transmission
properties also exist directly above and below the antenna. It is
designed for mounting on a roof or (together with the supplied
mounting bracket) under a ceiling, and it is thus suitable, for
example, for the mobile units of automated guided vehicle
systems.
The ANT795-6MT is connected to the SCALANCE W-780/W740
Access Points via QMA/N-Connect male/female IWLAN adapter
cables and the IWLAN flexible antenna connection cables in the
relevant length and connector version.
Horizontal
opening
angle
Vertical
opening
angle
G_IK10_XX_30027
© Siemens AG 2014